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Finding the Fourth Proportional to 643,226.66, 887,707.29 and 356,839

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Solution

The fourth proportional to 643,226.66, 887,707.29 and 356,839 is: 492,468.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,226.66 : 887,707.29 = 356,839 : x
  2. Step 2: Convert to fraction form
    643,226.66/887,707.29 = 356,839/x
  3. Step 3: Cross multiply
    643,226.66x = 887,707.29 × 356,839
  4. Step 4: Simplify right side
    643,226.66x = 316,768,581,656.31
  5. Step 5: Solve for x
    x = 316,768,581,656.31/643,226.66
  6. Step 6: Final answer
    x = 492,468.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.